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Proof step 1 from proof notnull-reachable (conclusion)

⊦ ¬ reachable(null, r1, H)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
reachable(null, r1, H), r1 ∈ H ⊦

Rule argument

Additional information

Used simplifier rules: reach-alloc: ⊦ reachable(r, r1, H) → r1 ∈ H;